Method of manufacturing excelsior pads



Get, 2, 1923. 1,469,420

W. E. LEIBING ET AL METHOD OF MANUFACTURING EXCELSIOR PADS Filed March29. 1922 3 Sheets-Sheet 1 W. E. LEIBING ET AL METHOD OF MANUFACTURINGEXCELSIOR PADS Filed March 29. 1922 3 Sheets-Sheet 3 .r E ma W 1 NQQOct. 2 1923. 1,469,420

v w. E. L'EIBING ET AL METHOD OF MANUFACTURING EXCELSIOR PADS FiledMarch 29. 1922 3 Sheets-Sheet 5 Patented @ct. 2, 1923.

UNITED WILLIAM E. LEIIBING AND LEROY C. TAGGART, OF OAKLAND, CALIFORNIA.

METHOD OF MANUFACTURING EKCELSIOR PADS.

Application filed March 29, 1922. Serial No. 547,755.

To all whom it may concern:

Be it known that we, WILLIAM E. LEIBING and LEROY C. TAGGART, citizensof the United States, residing at Oakland, in the county of Alameda andState of California, have invented certain new and useful Imrovements inMethods of Manufacturing xcelsior Pads, of which the following is aspecification.

The present invention relates to the method of manufacturing padsdesigned for use in packing articles generally, but more particularlyfor use in packing furniture, egg crates and the like, where a lightweight, durable, cheap packing is required. In packing articlesparticularly for transportation, it is, in most cases, essential thatpadding of some sort be employed as a protection against injury orbreakage, and due to the voluminous use of packing material the samemust be capable of being purchase at a low cost and clean and easy tohandle for the packer. Excelsior and other thin fibre by-products, alsomoss, have proven to be the cheapest and best materials for general use,but to readily handle the same it has been found essential that thepacking material be wrapped in relatively small pads. At present thesepads have been manufactured in tubular form with excelsior or likematerial employed as a filler, but in handling, due to the exposed ends,a packer, in his haste, will grasp the pad and ofttimes spill thecontents from the open end of the wrapper. This spilling meansconsiderable mess, entails waste, which is costly, and is undesirable.

Our present method has for its objects to enable the manufacture of arelatively cheap, filled pad adapted to be made and sold at a low cost;one which is sealed, precluding the spilling of the contents thereofwhen being handled by a packer, and enables its use for packinggenerally without the muss or mess occasioned by the use of the pads nowprovided for this purpose.

In carrying out our method we utilize the filled pad forming strip nowmanufactured and well known on the market, and sever from the same insuccession, pad forming sections, and to prevent the spilling of thematerial from the out ends thereof we seal the ends as the cut sectionsare conveyed to a place of deposit.

In carrying out our method invention, we have illustrated the essentialworking inend sealing stri Fig. 2 is a longitudinal sectional view takenon line 22 of Fig. 1.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 1.

Fig. 4. is an end view of the filled pad formlng strip, illustrating thelap joint of .the wrapper.

Fig.5 1s a view in detail of the pad forming strip take-up means and thepad cuttin knife, the take-up means being in norma position.

Fig. 6 is a view similar to Fig. 5 illustrating the knife in operationand the takeup means in a position to absorb the continuous feed of thepad material during the cutting operation.

Fig. 7 is a view in side elevation of the curling member and the pivotedend sealing strip compressing member mounted in pairs at opposite sidesof the apparatus.

Fig. 8 is a sectional view taken. on line 88 of Fig. 7, with the pivotedend sealing strip compressing member in raised position.

Fig. 9 is a view similar .to Fig. 8 with, said member in loweredposition.

Fig. .10 is a view in perspective of one of the pads, illustrating themanner of applyingrthe end sealing strips thereto.

ig. 11 is a view in perspective of the finished pad. 4

In carrying out our method invention, the apparatus illustrated,particular reference being had to Figs. 1 and 3, comprises endlessconveying belts 1 and 2 operating around rollers 3 and 4 in slightparallel spaced relation and between opposite faces of said belts thefilled pad forming strip 5 is conveyed in a continuous length, the stripcontaining a filler 6, Fig. 4, of excelsior, mass or like long fibrematerial, which is enclosed by a wrapper 7, lapped as at 8, forming alongitudinal seam.

From the ends of the belts 1 and 2, and due to their action, thecontinuous filled strip of pad forming material is conveyed between theparallelfii hts 9 of the guide and restoring bolts 10, the flights 9operating around end rollers 10' and the respective drive rollers 11,which are operated in any suitable manner to move the belts in thedirection of the arrows-Fig. 3.

Associated with each belt is a p1votally .mounted, spring hold, take-uproller 12 carried by an arm 13-Fig. 3 of the drawms.

0 the inner side of each belt flight 9, extending transversely acrossthe belt, is a roller 13', the rollers being connected at their ends bya frame 14 which is fulcrumed on a horizontal axis 15, and from saidframe extends an arm 16 connected through a link 17 with one end of alever 18, pivoted as at 19, and carrying a cam surface 20. The camsurface 20 is acted on by opposing cams 21 carried by the shaft 22supporting the roller 4, and between the end of the lever 18 and the endof link 17 there is affordeda limited amount of play as illustrated inFig. .3.

At one end of the passageway formed by the belt flights 9, the conveyedpad formin strip passes over a support 21 dispose transversely beneaththe same and above said support is mounted for vertical reciprocation apresser foot 22', the stem 23 of which passes through spaced guidescarried by a block 24, the foot being yieldably mounted by a spring 25.At the inner edge of the support 21. is positioned a cutting blade 26and with the same cooperates a cutting blade 27 carried by the block 24.A cam 28 on a shaft 29, which is operated in timed relation with theshaft 22, operates the block 24 to depress the foot 22,-operate theknife 27 and sever a pad from the strip 5.

At the time of the operation of the foot 22 and the arresting of themovement of the strip 5, the rollers 13, through the lever 18 and link17, are moved from their position in Fig. .5 to that in Fig. 6, takingup the continuous feed of strip 5 until such time as the foot 22 isreleased. On the release of the foot 22 the belt take-up rollers 12restore a previousl bent portion of the strip 5 to a horizonta 0positionand project the end thereof beyon the wives 26 and 2 The previouslydescribed mechanism sets forth one embodiment of an invention forcarrying out our method invention, whereby independent pads are formedfrom a strip of filled pad forming material. v

The pads as formed by severing the pro jecting end of the Slll'lf" 5transversely by the action of the cutting I." 'ves 26 and 27-, fall on areciprocating pad receiving table 30, operating over a support 31, andreciprocates in timed relatlon with the operation of the cam 28 by anysuitable mechanism.

The blade 26 forms one side edge of the table and a flange 32 forms theopposite side neeenao edge of the table. The table at its front edge isunobstructed and at its rear carries a pad engagin lip 33. Transverselyacross the end ofsai table 30, one above and one below the same, are theconveying rollers 34:, and around said rollers pass the ad compressingand feed belts 35, which a so operate around rollers 36, which dividethe belt into upper and lower flights disposed in arallel relation, theupper flight of the ower belt operating over a compressing table orsupport 37, and the lower fii ht or the upper belt being disposed in arelel relation therewith, and said upper be t being provided with atake-up 37.

The pad end sealing strips are mounted preferably in roll form as at 38and the respective strips as unwound from the rolls pass around suitableidlers 39 which direct the same around other idlers 40 disposed aboveadhesive supplying means 41 dipping into a tank 42, thus on the feed ofthe strips from the rolls 38, one surface thereof is supplied with anadhesive of any suitable type. The strips after receiving the adhesivepass in ahorizontal direction beneath the support 31 and in arallelrelation between rotating cutting r0 lers 43 operated in any suitablemanner and extending preferably transversely beneath the support '31.Associated with the cuttin rollers 43 are the strip section teed rolliars 4.4 for picking up the section after it is cut from the strip andfor feeding the same upwardl on the incline 45 disposed parallel with te lower roll 34. and delivering the same at a point beneath the severedpad as the same is advanced by the lip 33. The rolls 4:3 and M areoperated in timed relation and it will be observed that after a sectionof sealing strip is cut from the main body of the strip forming materialthat the continued rotation of the cuttin rolls picks u the end of thestri and fee s the same to t e feed rolls 44, an that the cut section isengaged by the rolls 4% before the same is severed from the main body ofsealing strip forming material. The upper roll 34 has one or more padengagmg teeth ,46 adapted on each revolution to engage the pad as movedforwardly on the table 30 and to advance the same between the belts 35and simultaneously with the engagement of the teeth 46 with the pad, theaction of the belts 35 compresses the forward edge of the pad onto theforward end of the severed end sealing strips, which have been fedbeneath the same by the rolls 4a.

The action of the belts 35 is to propel the pad, with the end sealingstrips adhesivel engaging the under face of the ends thereo over thetable or support. During this conveying, a portion of each end sealingstrip projects, as at 47, beyond the end of the pad, and to curl thesame thereover and close the opposite open ends of the pads ltd aeeaeaowe provide at each side of'the lower helt 35, mwardly convergingupwardly and inwardly curled end sealing strip curling memhers 48, whichextend'parallel with the lower I belt to a point slightly beyond thetakeup 37, as in Fig. 1, an the conveying of the ad beyond said memberscauses the mem ers to raise the projecting portion of the end sealinstrips to a substantially verw-tical plane. i said members 48 weposition one on each side of the lower bolt 35 the pivotally mounted endsealing strip folding and compressing members 49, pivoted as at 50, andwhich are operated in 13 timed relation to swing on said pivot from theposition indicated in Fig. 8 to that in lFi 9.

l t will be observed that the members 48 raise the projecting ends 47 ofthe sealin strips from a horizontal to a vertical post tion, and thatthe action of the members 49 folds the upwardly extended edge-downwardlyover the ends of said ads, formin an end seal, as indicated 'in ig. 1].,wit each end of the pad closed by a substantially U-shaped end closuremember 51 adhesively secured thereto.

Having thus described our invention what we claim as new and] desire tosecure by Lettors Patent ofthe United States is 1. A method of makingsealed packing pads, consistin in continuously feeding a strip of wrappepacking material into a machine, stopping t e movement of said strip theend portion from said strip to form a pad section while it is stopped,feeding the successively severed sections through the machine in spacedrelation and feeding and applying adhesively coated strips over. the cutends of said pad sections to close said ends and complete the pad, anddelivering said complete pads from the mace.

2. A method of making sealed pack ng pads, consisting in continuouslyfeeding a strip of wrapped packing material into a machine, intettentistopping and severi the end portion cm the strip to suecevely to aseries of pad tions, feed at predetermined intervals therein, severingand severing stri ing said sections through the machine in spacedrelation, feeding strips into said machine, gumming and severing stripsections from the said paper strips, successively feeding said stripsections into engagement with said pad sections, foldin said stripsections over the open ends 0 said pad sections for seali said ends toform a closed sealed pad e g delivering said sealed pads from themachine.

3. A method of making sealed acking pads, consisting in continuouslyrming a series of pad sections from a wrapped packing strip, feedingsaid sections in spaced relation through a machine, forming opposedummed strip sections from paper strips, ceding said strip sections inparallel spaced relation into engagement with the pad sections andapplying said strip sections over the open ends of sald pad sections toseal said pad sections, and successively delivering said sealed packingpads from the machine.

4. A. method of making sealed packing pads, consisting in continuouslyfeeding a strip of wrapped packing material into a machine,intermittently stoppin and severing the end portion from the strip tosuccessively form a series of pad sections, providing a take-up for saidstrip during and adjacent the point of stopping thereof for holdin andguiding the-movement of the strip, ceding said sections through themachine in spaced relation, feeding a pair of paper strips into saidmachine, gumming sections from said paper strips, successive y feedingsaid strip sec-- tions into engagement with said pad sections, foldingsaid stri sections over the open ends of said pa sections for sealinsaid ends to form a closed sealed pad and de ivering said sealed padsfrom the machine.

In testimony whereof we have signedour names to this specification LIAME. LEIBING. LERQY C. TAGGART.

a pair of paper,

